Long time lurker, first time poster.
Been having quite a time getting the 4.3GL back up and running after a cylinder head rebuild. We ended up with the wrong spark plugs and one of them cracked off inside the engine and broke one of the exhaust valves. We pulled the heads off and got them professionally rebuilt. After putting everything back together the motor will crank but it will not turn over. Below is a list of things we've confirmed.
Spark plugs are correct now. Installed Champion RV15YC4's gapped at .045". Verified there is spark running the engine with the plugs pulled out (one at a time) and grounded. I'm not the best at confirming 'good' spark but it is sparking.
Replaced distributor cap and rotor.
Set timing on cap/rotor to rotor pointing to Cylinder #1 with Cylinder #1 at TDC.
Verified fuel pump is operating correctly, pulled line connected to pump and saturates a towel when trying to crank the engine.
Verified fuel is getting into the carb visually.
Dropped the carb and verified float / jets are operating as should be.
Verified compression on the cylinders after the rebuild. Was around 140-150.
We didn't touch anything else to do with timing besides taking off the distributor when putting the new cylinder heads on. At this point I'm completely at a loss for what else it could be. Compression, gas and spark are present. It should at least turn over for a few seconds. We even tried putting some gas directly in the carb and it wouldn't kick over. Also tried starting fluid on multiple occasions. We are getting some puffs back up through the carb during starting that is slightly concerning but I'm assuming the timing isn't completely perfect yet but I feel it should be close enough to at least run for a couple seconds.
Any help would be greatly appreciated. Thank you.
Been having quite a time getting the 4.3GL back up and running after a cylinder head rebuild. We ended up with the wrong spark plugs and one of them cracked off inside the engine and broke one of the exhaust valves. We pulled the heads off and got them professionally rebuilt. After putting everything back together the motor will crank but it will not turn over. Below is a list of things we've confirmed.
Spark plugs are correct now. Installed Champion RV15YC4's gapped at .045". Verified there is spark running the engine with the plugs pulled out (one at a time) and grounded. I'm not the best at confirming 'good' spark but it is sparking.
Replaced distributor cap and rotor.
Set timing on cap/rotor to rotor pointing to Cylinder #1 with Cylinder #1 at TDC.
Verified fuel pump is operating correctly, pulled line connected to pump and saturates a towel when trying to crank the engine.
Verified fuel is getting into the carb visually.
Dropped the carb and verified float / jets are operating as should be.
Verified compression on the cylinders after the rebuild. Was around 140-150.
We didn't touch anything else to do with timing besides taking off the distributor when putting the new cylinder heads on. At this point I'm completely at a loss for what else it could be. Compression, gas and spark are present. It should at least turn over for a few seconds. We even tried putting some gas directly in the carb and it wouldn't kick over. Also tried starting fluid on multiple occasions. We are getting some puffs back up through the carb during starting that is slightly concerning but I'm assuming the timing isn't completely perfect yet but I feel it should be close enough to at least run for a couple seconds.
Any help would be greatly appreciated. Thank you.